Estimate the minimum sample size needed to achieve the margin of error E = 0.029 for a 95% confidence intervail The minimum sample size is ... (Round up to the nearest integer.)
Q: Find the critical value to for the confidence level c = 0.98 and sample size n = 16. Click the icon…
A: given data, c=0.98α=1-0.98=0.02n=16df=n-1=16-1=15tc=?
Q: Determine the minimum sample size required when you want to be 95% confident that the sample mean…
A: Determine the minimum sample size required when you want to be 95% confident that the sample mean…
Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean is…
A: From the provided information, Population standard deviation (σ) = 15.1 Confidence level = 90%…
Q: Find the critical value t, for the confidence level c=190 and sample size n=9 Click the icon to view…
A: Given that Confidence level (c) = 0.90 Sample size (n) = 9
Q: The sample size for a two-tailed hypothesis test for a population mean below where z/2 is the…
A: Solution: σ= 15 Population standard deviation To test the hypothesis Ho:μ=30 VS Ha:μ≠30
Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean…
A: Givenstandard deviation(σ)=19.4Margin of error(E)=1confidence level = 90%
Q: Assume the population is normally distributed. A 99% confidence level requires a sample size of
A: The formula to compute sample size is,
Q: Sh P-h Nh nh 1 138 30 0.50 200 20 2 103 25 0.78 250 30 3 210 50 0.21 100 25 c. Develop an…
A: stratum Xbar Sh Ph Nh nh 1 138 30 0.5 200 20 2 103 25 0.78 250 30 3 210 50 0.21 100 25…
Q: simple random sample of size n=16 is drawn from a population that is normally distributed. The…
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Q: Solve the problem
A: The objective of the question is to find the sample mean (x) and the margin of error (E) given a…
Q: Determine the t-score for a 99% confidence interval for a population mean from a sample of size 8.
A: Confidence level 99% with sample size n=8 then to find t-score for the 99% confidence interval
Q: 7) Find the 95%confidence interval for the mean of a bell-shaped distributions, given: x = 98.20° F…
A: Given information Sample size (n) = 106 Sample mean = 98.20 F Sample standard deviation = 0.62 F…
Q: Determine the minimum sample size required when you want to be 95% confident that the sample mean is…
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Q: Find the standard error of the mean, and then find an approximate 95% confidence interval for the…
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Q: Determine the 99% confidence interval estimate for the population mean of a normal distribution…
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Q: b. Identify and interpret the margin of error. The margin of error is (Round to two decimal places…
A: Given : n= 9.0 , x̄= 35.0 s= 6.0 At 95.0 % confidence level , z score= 1.96
Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean is…
A: Population standard deviation (σ) = 11.8 and confidence interval (c.i) = 90% and margin of error (E)…
Q: 200 trains are sampled and it is determined how many minutes late their arrival was. The following…
A: From the output, the 99% confidence interval is (-1.94, 8.65).
Q: mean commute time to work was 32.2 minutes and the standard deviation was 7.3 minutes. Assume the…
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Q: Determine the minimum sample size required when you want to be 95% confident that the sample mean…
A: Solution: From the given information, confidence level is 0.95, σ=17.9 and E=1.
Q: A researcher wants to make a 99% confidence interval for a population proportion. A preliminary…
A: From the given information, Margin error = 0.032 Sample proportion = 0.665 The objective is to…
Q: Determine the minimum sample size required when you want to be 99% confident that the sample mean is…
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Q: A random sample of 36 textbook prices is taken from a local college bookstore. The mean of the…
A: Let, X : The price of all textbooks in the bookstore. Given: Sample size = n = 36 Sample mean = x =…
Q: Consider a random sample of size n = 144 yielded p = 0.76. Which of the following is a 90%…
A: Confidence Interval for one sample proportion : A confidence interval has the property that we are…
Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many…
A: It is given that confidence level is 0.98, population standard deviation is 1 and margin of error E…
Q: Determine the sample size necessary to construct a 85% confidence interval with an error of 0.72 if…
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Q: Determine the minimum sample size required when you want to be 95% confident that the sample mean…
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Q: Determine the sample size needed to construct a 90% confidence interval to estimate the population…
A: Givenconfidence level=90%standard deviation(σ)=75Margin of error(E)=12
Q: A random sample of n = 100 individuals is collected, and a confidence interval for the population…
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Q: Find the critical value to for the confidence level c = 0.80 and sample size n = 15. tc= Click the…
A: We have given that,Sample size (n)= 15 Confidence level (c)= 80%Level of significance () =0.20The…
Q: Determine the minimum sample size required when you want to be 99% confident that the sample mean…
A: The formula for computing sample size is, Here E is the error and σ is the population standard…
Q: Determine the minimum sample size required when you want to be 95% confident that the sample mean…
A: It is given that the confidence level is 0.95, the population standard deviation is 16.7 and the…
Q: Find the 98% confidence interval for the difference between two means based on this information…
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Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean is…
A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…
Q: Determine the minimum sample size required when you want to be 95% confident that the sample mean is…
A: Step 1: Given,Confidence level: 95% Population standard deviation (σ): 11.6,and given we want the…
Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean…
A: It is given that confidence level is 0.90, population standard deviation is 17.4, and the margin of…
Q: The pulse rates of 158 randomly selected adult males vary from a low of 35 bpm to a high of 115 bpm.…
A: Given : Lower limit = 35 Upper limit = 115
Q: A sample of 80 University night school students' ages was obtained in order to estimate the mean age…
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Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 5. How many…
A: Sample size: Sample size is the number of observations in the sample. Critical value: Critical value…
Q: A previous study estimated the value of p to be 0.79. Find the minimum sample size required to…
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Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean is…
A: Here, E = 1 and σ = 11.3.
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- Determine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean and σ=19.2. Assume the population is normally distributed.A 99% confidence level requires a sample size ofenter your response here. (Round up to the nearest whole number as needed.)Find the 98% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean Std. Dev. 1 16 38 29 2 29 28 29 Lower Limit Upper LimitWhat does brand loyalty mean to consumers? According to a recent research report, 38% of consumers associate trust with brand loyalty. Complete parts (a) through (e) below. a. To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within ±0.04 of the population proportion, how large a sample size is required? A sample size of 566566 consumers is required. (Round up to the nearest integer.) b. To conduct a follow-up study that would provide 99% confidence that the point estimate is correct to within ±0.04 of the population proportion, how many people need to be sampled? A sample size of 978978 consumers is needed. (Round up to the nearest integer.) c. To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within ±0.02 of the population proportion, how large a sample size is required? A sample size of 22632263 consumers is…
- Find the critical value t, for the confidence level c = 0.99 and sample size n = 20. Click the icon to view the t-distribution table. ...... (Round to the nearest thousandth as needed.)Find the Sample Size Required to Estimate a Population Mean With a Given Confidence Level Question Suppose the finishing times for cyclists in a race are normally distributed. If the population standard deviation is 16 minutes, what minimum sample size is needed to be 90% confident that the sample mean is within 5 minutes of the true population mean? Zo.10 Zo.05 Zo.025 Z0.01 Zo.005 1.2821.645 1.960 |2.326 2.576 Use the table above for the z-score, and be sure to round up to the nearest integer.A previous study estimated the value of p to be 0.54. Find the minimum sample size required to ensure that your estimate ("p) will be within 0.01 of p with 90% confidence.
- Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and σ=18.9. Assume the population is normally distributed. A 90% confidence level requires a sample size of _____________.Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and o= 12.2. Assume the population is normally distributed. A 90% confidence level requires a sample size of (Round up to the nearest whole number as needed.)(2) Choose the one alternative that best completes the statement or answers the question. Assume two independent random samples are available which provide sample proportions. For the first sample assume n₁ = 100 and x₁= 39. For the second sample, assume n₂= 100 and x₂= 49. Test the null hypothesis that the population proportions are equal versus the alternative hypothesis that the proportions are not equal at the 90% confidence level. Frame the test statistic by subtracting the proportion for population 1 from that for population 2. Pick an appropriate z value, p-value and conclusion. Round your answer to the nearest thousandth. Note that this is a two- tailed test. z-value = -1.425 p-value= 0.077 statistically significant z-value = 1.425 p-value= 0.077 statistically significant z-value = -1.425 p-value= 0.077 not statistically significant z-value = 1.425 p-value= 0.154 statistically not significant
- Determine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean and sigmaσequals=11.6 Assume the population is normally distributed. A 99% confidence level requires a sample size of (Round up to the nearest whole number as needed.)In a random sample of ten people, the mean driving distance to work was 25.5 miles and the standard deviation was 7.3 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean μ. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean. (...) (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. % of all random samples of ten people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints. OB. It can be said that % of the population has a driving distance to work (in miles) that is between the interval's endpoints. OC. With % confidence, it can be said that most driving distances to…For the provided sample mean, sample size, and population standard deviation, complete parts (a) through (c) below. Assume that x is normally distributed. x=31 n=9 σ=6 a. Find a 95% confidence interval for the population mean. The 95% confidence interval is from _______ to __________. (Round to two decimal places as needed.) b. Identify and interpret the margin of error. The margin of error is ___________ (Round to two decimal places as needed.) Interpret the margin of error. Choose the correct answer below. A. We can be 95% confident that the population mean, μ, is within the margin of error of the sample mean, 31. B. We can be 95% confident that any possible value of the variable is within the margin of error of the sample mean, 31. C. We can be 95% confident that any possible value of the variable is within the margin of error of the population mean, μ. D. We can be 95% confident that any possible sample mean is within the…